Honeywell SYA14 Series Manual page 736

FIG. 14. FF-SRS5925 TROUBLESHOOTING FLOW DIAGRAM (PAGE 3 OF 3)
Are two channel
inputs selected?
Ensure the S1
switch is in the "with
detection" position.
Disconnect S11. Is input
channel one closed ? Also,
is there less than 68 Ohms
between S11/S12 and
more than 21 Vdc between
S12/A2 ? Disconnect S21.
Is input channel two
closed? Also, is there less
than 68 Ohms between
S21/S22 and more than 21
Vdc between S22/A1?
12
From
Page 2
No
Yes
cross-fault
No
Reconnect S11
and S21. Correct/
replace the
external sensor(s),
wiring, supply
voltage, etc.
Yes
Yes to all
questions
Reconnect S11
(and S21).
Safety module has
failed. Replace the
module.
Go to
Page 2
107035-02 EN FR26 ROW 0499 Printed in Germany
Ensure the S1 switch
is in the "without
cross-fault detection"
position.
Disconnect S11 and
ensure input channel one
is closed, less than 68
Ohms between S11/S12
and more than 21 Vdc
between S12/A2.
No
Reconnect S11.
Correct/replace the
external sensor(s),
wiring, supply
voltage, etc.